CVE-2021-27653

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.09% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 62.9% of scored records. A rank, not a probability.

NVD base score

4.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-01 18:38Z5 YR AGO

Last updated

2024-09-16 23:11Z1 YR AGO

Reserved

2021-02-24

Assigning CNA

Pega

Record state

PUBLISHED

Severity

Medium (CVSS 6.6)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-284Improper Access ControlPillar

Data version

5.1

Document digest

fa10e09c437abf7ef9cf7dd97389f5cf3a4510bbdfcf5b649def502442e6a89b

• collaborate.pega.comhttps://collaborate.pega.com/discussion/pega-security-advisory-%E2%80%93-b21x_refsource_MISC
• robertwillishacking.comhttps://robertwillishacking.com/census-vulnerability-exposes-10k-oauth-tokens-thousands-of-user-records/x_refsource_MISC